lm man page on OpenBSD

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LM(4)			  OpenBSD Programmer's Manual			 LM(4)

     lm - National Semiconductor LM78/79/81 temperature, voltage, and fan

     lm0 at isa? port 0x290
     lm1 at isa? port 0x280
     lm2 at isa? port 0x310
     lm* at iic?
     lm* at wbsio?

     The lm driver provides support for the National Semiconductor LM78/79/81
     hardware monitors and register compatible chips to be used with the
     sysctl(8) interface.

     The original LM78 hardware monitor supports 11 sensors:

	   Sensor    Units    Typical Use
	   IN0	     uV DC    Core voltage
	   IN1	     uV DC    Unknown
	   IN2	     uV DC    +3.3V
	   IN3	     uV DC    +5V
	   IN4	     uV DC    +12V
	   IN5	     uV DC    -12V
	   IN6	     uV DC    -5V
	   Temp	     uK	      Motherboard Temperature
	   Fan0	     RPM      Fan
	   Fan1	     RPM      Chassis Fan
	   Fan2	     RPM      Fan

     For other devices, sensors' names and numbers will be different.

     Chips supported by the lm driver include:

	   -   National Semiconductor LM78 and LM78-J
	   -   National Semiconductor LM79
	   -   National Semiconductor LM81
	   -   Winbond W83627HF, W83627THF, W83637HF and W83697HF
	   -   Winbond W83627DHG and W83627EHF
	   -   Winbond W83781D, W83782D and W83783S
	   -   Winbond W83791D, W83791SD and W83792D
	   -   ASUS AS99127F

     Some devices can attach to both iic(4) and isa(4); others can only attach
     to either one or the other.  If the lm driver detects a device attaching
     to both iic(4) and isa(4), it will detach the device from iic(4).

     iic(4), isa(4), wbsio(4), sensorsd(8), sysctl(8)

     The lm driver first appeared in NetBSD 1.5; OpenBSD support was added in
     OpenBSD 3.4.

     The lm driver was written by Bill Squier and ported to OpenBSD 3.4 by
     Alexander Yurchenko <grange@openbsd.org>.	The driver was largely
     rewritten for OpenBSD 3.9 by Mark Kettenis <kettenis@openbsd.org>.

     Some vendors connect these chips to non-standard thermal diodes and
     resistors.	 This will result in bogus sensor values.

     Interrupt support is unimplemented.

     There are currently no known pnpbios IDs assigned to LM chips.

     This driver attaches to the Winbond W83791SD chip even though that chip
     does not have any sensors.

OpenBSD 4.9		      September 19, 2010		   OpenBSD 4.9

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